syzkaller login: [ 39.261132] BUG: Bad rss-counter state mm:00000000d707489b type:MM_FILEPAGES val:33 [ 39.262342] BUG: Bad rss-counter state mm:00000000d707489b type:MM_ANONPAGES val:22 [ 39.301507] ================================================================== [ 39.302509] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.303448] Read of size 8 at addr ffff888015aeb968 by task sshd/219 [ 39.304225] [ 39.304444] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.305328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.306321] Call Trace: [ 39.306644] [ 39.306929] dump_stack_lvl+0x91/0xf0 [ 39.307417] print_report+0xcc/0x620 [ 39.307898] ? __virt_addr_valid+0x102/0x340 [ 39.308466] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.309081] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.309703] kasan_report+0xbe/0xf0 [ 39.310190] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.310815] vma_interval_tree_remove+0xc75/0xec0 [ 39.311414] vma_prepare+0xc54/0x11a0 [ 39.311905] __split_vma+0x5af/0x950 [ 39.312375] ? __pfx___split_vma+0x10/0x10 [ 39.312908] ? find_held_lock+0x2c/0x110 [ 39.313455] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.314033] ? lock_is_held_type+0x9f/0x120 [ 39.314574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.315188] ? mtree_range_walk+0x632/0x900 [ 39.315739] ? mas_walk+0x5c7/0x7c0 [ 39.316213] do_vmi_munmap+0x1f1/0x2b0 [ 39.316702] mmap_region+0x1f9/0x2660 [ 39.317194] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.317708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.318424] ? __pfx_lock_acquire+0x10/0x10 [ 39.318965] ? __pfx_mmap_region+0x10/0x10 [ 39.319500] ? security_mmap_addr+0x7d/0xa0 [ 39.320035] ? get_unmapped_area+0x1f5/0x3f0 [ 39.320596] do_mmap+0x854/0xf00 [ 39.321034] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.321544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.322107] ksys_mmap_pgoff+0x3af/0x500 [ 39.322611] do_syscall_64+0x3f/0x90 [ 39.323086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.323731] RIP: 0033:0x7f1f57dc5d82 [ 39.324186] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 39.326290] RSP: 002b:00007ffc44d4f0e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.327192] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f57dc5d82 [ 39.328038] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f571ff000 [ 39.329005] RBP: 00007f1f571ff000 R08: 0000000000000009 R09: 0000000000001000 [ 39.329881] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604ff24cec0 [ 39.330761] R13: 00007ffc44d4f100 R14: 00007ffc44d4f130 R15: 00007ffc44d4f490 [ 39.331627] [ 39.331922] [ 39.332134] Allocated by task 212: [ 39.332561] kasan_save_stack+0x22/0x50 [ 39.333074] kasan_set_track+0x25/0x30 [ 39.333587] __kasan_slab_alloc+0x59/0x70 [ 39.334113] kmem_cache_alloc+0x16b/0x370 [ 39.334630] vm_area_dup+0x20/0x160 [ 39.335096] __split_vma+0x170/0x950 [ 39.335564] split_vma+0xc6/0x110 [ 39.336006] mprotect_fixup+0x8d2/0xb30 [ 39.336510] do_mprotect_pkey+0x87e/0xd40 [ 39.337031] __x64_sys_mprotect+0x78/0xc0 [ 39.337565] do_syscall_64+0x3f/0x90 [ 39.338041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.338684] [ 39.338901] Freed by task 212: [ 39.339290] kasan_save_stack+0x22/0x50 [ 39.339797] kasan_set_track+0x25/0x30 [ 39.340294] kasan_save_free_info+0x2b/0x50 [ 39.340829] __kasan_slab_free+0x10a/0x190 [ 39.341389] kmem_cache_free+0x10d/0x4d0 [ 39.341895] rcu_core+0x8c8/0x2860 [ 39.342338] __do_softirq+0x1b7/0x7d4 [ 39.342820] [ 39.343033] Last potentially related work creation: [ 39.343618] kasan_save_stack+0x22/0x50 [ 39.344122] __kasan_record_aux_stack+0x8e/0xa0 [ 39.344698] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.345350] remove_vma+0x139/0x170 [ 39.345806] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.346364] do_vmi_munmap+0x1f1/0x2b0 [ 39.346849] __vm_munmap+0x138/0x3a0 [ 39.347327] __x64_sys_munmap+0x59/0x80 [ 39.347827] do_syscall_64+0x3f/0x90 [ 39.348300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.348935] [ 39.349171] The buggy address belongs to the object at ffff888015aeb910 [ 39.349171] which belongs to the cache vm_area_struct of size 168 [ 39.350643] The buggy address is located 88 bytes inside of [ 39.350643] freed 168-byte region [ffff888015aeb910, ffff888015aeb9b8) [ 39.352045] [ 39.352263] The buggy address belongs to the physical page: [ 39.352923] page:0000000068f59d6d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15aeb [ 39.354034] memcg:ffff88800ab8f701 [ 39.354462] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.355120] page_type: 0xffffffff() [ 39.355576] raw: 0100000000000200 ffff88800879fc80 ffffea000037b800 dead000000000006 [ 39.356492] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ab8f701 [ 39.357421] page dumped because: kasan: bad access detected [ 39.358088] [ 39.358306] Memory state around the buggy address: [ 39.358888] ffff888015aeb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.359753] ffff888015aeb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.360608] >ffff888015aeb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.361493] ^ [ 39.362276] ffff888015aeb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.363132] ffff888015aeba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.363987] ================================================================== [ 39.365108] Disabling lock debugging due to kernel taint [ 41.097112] BUG: Bad rss-counter state mm:00000000e911db54 type:MM_FILEPAGES val:33 [ 41.097887] BUG: Bad rss-counter state mm:00000000e911db54 type:MM_ANONPAGES val:22 [ 41.488250] BUG: Bad rss-counter state mm:00000000f384797f type:MM_FILEPAGES val:33 [ 41.489992] BUG: Bad rss-counter state mm:00000000f384797f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33863' (ECDSA) to the list of known hosts. 2023/06/19 20:00:04 fuzzer started 2023/06/19 20:00:05 dialing manager at localhost:44161 2023/06/19 20:00:05 checking machine... 2023/06/19 20:00:05 checking revisions... [ 42.209319] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:00:05 testing simple program... [ 42.252468] cgroup: Unknown subsys name 'net' [ 42.315187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:00:04 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000055602197abf0 RCX=ffffffff8215be8f RDX=ffff8880102c3680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888018eb7db8 RSP=ffff888018eb79c0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000001000 R15=ffff888018eb7db0 RIP=ffffffff814c07eb RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6bf0190900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f6bf0745650 CR3=000000000db40000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff8880102c1b40 RCX=ffff888015818000 RDX=ffff88806cf09a78 RSI=ffff8880102c1b40 RDI=ffff8880158178e0 RBP=ffff88806cf09a78 RSP=ffff88806cf09988 R8 =ffffffff864b115c R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b523e R12=ffff8880158178e0 R13=ffff88806cf02000 R14=ffff8880158178e8 R15=ffff88806cf09a78 RIP=ffffffff845081ac RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffabde90900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffabd2e7990 CR3=000000000d81a000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ee68bf08439c12de00000000000ae988 XMM05=d4e58a6a133d9cc30000000000134ec0 XMM06=806171799158d9670000000000133940 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000